9 5 3 EQUIPPED WITH BOBCAT INTERLOCK CONTROL SYSTEM (BICSTM)
Service Manual
6724352 (11–95)
Printed in U.S.A.
© Melroe Company 1995
MAINTENANCE SAFETY WARNING
Instructions are necessary before operating or servicing machine. Read and understand the Operation & Maintenance Manual, Operator’s Handbook and signs (decals) on machine. Follow warnings and instructions in the manuals when making repairs, adjustments or servicing. Check for correct function after adjustments, repairs or service. Untrained operators and failure to follow W-2003-0903 instructions can cause injury or death.
Safety Alert Symbol: This symbol with a warning statement, means: “Warning, be alert! Your safety is involved!” Carefully read the message that follows.
CORRECT
CORRECT
CORRECT
B-10731a
B-12365
B-7469
Never service the Bobcat SkidSteer Loader without instructions.
Use the correct procedure to lift or lower operator cab.
Cleaning and maintenance are required daily.
WRONG
WRONG
WRONG
B-11799
B-15231
B-15280
Have good ventilation when welding or grinding painted parts. Wear dust mask when grinding painted parts. Toxic dust and gas can be produced. Avoid exhaust fume leaks which can kill without warning. Exhaust system must be tightly sealed.
Disconnecting or loosening any hydraulic tubeline, hose, fitting, component or a part failure can cause lift arms to drop. Do not go under lift arms when raised unless supported by an approved lift arm support device. Replace it if damaged.
Never work on loader with lift arms up unless lift arms are held by an approved lift arm support device. Replace if damaged. Never modify equipment or add attachments not approved by Bobcat Company.
WRONG
WRONG
WRONG
B-6590
B-6580 B-16102
B-6589 B-16102
Stop, cool and clean engine of flammable materials before checking fluids. Never service or adjust loader with the engine running unless instructed to do so in the manual. Avoid contact with leaking hydraulic fluid or diesel fuel under pressure. It can penetrate the skin or eyes. Never fill fuel tank with engine running, while smoking or when near open flame.
Keep body, jewelry and clothing away from moving parts, electrical contact, hot parts and exhaust. Wear eye protection to guard from battery acid, compressed springs, fluids under pressure and flying debris when engines are running or tools are used. Use eye protection approved for type of welding. Keep rear door closed except for service. Close and latch door before operating the loader.
Lead-acid batteries produce flammable and explosive gases. Keep arcs, sparks, flames and lighted tobacco away from batteries. Batteries contain acid which burns eyes or skin on contact. Wear protective clothing. If acid contacts body, flush well with water. For eye contact flush well and get immediate medical attention.
Maintenance procedures which are given in the Operation & Maintenance Manual can be performed by the owner/ operator without any specific technical training. Maintenance procedures which are not in the Operation & Maintenance Manual must be performed ONLY BY QUALIFIED BOBCAT SERVICE PERSONNEL. Always use genuine Bobcat replacement parts. The Service Safety Training Course is available from your Bobcat dealer. MSW01-0805
CONTENTS FOREWORD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii SAFETY INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v SERIAL NUMBER LOCATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii DELIVERY REPORT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii BOBCAT LOADER IDENTIFICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . viii PREVENTIVE MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–1 HYDRAULIC SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–1 HYDROSTATIC SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–1 DRIVE SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–1 MAIN FRAME . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–1 ELECTRICAL SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–1 ENGINE SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7–1 BICS™ SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8–1 SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9–1
PREVENTIVE MAINTENANCE
HYDRAULIC SYSTEM
HYDROSTATIC SYSTEM
DRIVE SYSTEM
MAIN FRAME
ELECTRICAL SYSTEM
ENGINE SERVICE
BICS™ SYSTEM
SPECIFICATIONS
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953 Bobcat Loader Service Manual
FOREWORD This manual is for the Bobcat loader mechanic. It provides necessary servicing and adjustment procedures for the Bobcat loader and its component parts and systems. Refer to the Operation & Maintenance Manual for operating instructions, starting procedure, daily checks, etc. A general inspection of the following items must be made after the loader has had service or repair: 1. Check that the ROPS/FOPS (Including sidescreens) is in good condition and is not modified.
9. Enclosure door latches must open and close freely.
2. Check that ROPS mounting hardware is tightened and is Melroe approved.
10. Bob–Tach wedges and linkages must function correctly and be in good condition.
3. The seat belt must be correctly installed, functional and in good condition.
11. Safety treads must in good condition.
4. The seat bar and pedal interlocks must be correctly adjusted, clean and lubricated.
12. Check for correct function of indicator lamps (Optional on some models).
5. Machine signs must be legible and in the correct location.
13. Check hydraulic fluid level, engine oil level and fuel supply.
6. Steering levers and foot pedals must return to neutral.
14. Inspect for fuel, oil or hydraulic fluid leaks.
7. Check for correct function of the work lights.
15. Lubricate the loader.
8. The parking brake function correctly.
16. Check the condition of the battery and cables.
must
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953 Bobcat Loader Service Manual
17. Inspect the air cleaner for damage or leaks. Check the condition of the element.
18. Check the electrical charging system.
19. Check tires for wear and pressure.
20. Inspect for loose or broken parts or connections.
21. Operate the loader and check all functions.
22. Check for any field modification not completed.
23. Check for correct function of the Bobcat Interlock Control System (BICS™) before the machine is returned to the customer. Recommend to the owner that all necessary corrections be made before the machine is returned to service.
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953 Bobcat Loader Service Manual
SAFETY INSTRUCTIONS
Instructions are necessary before operating or servicing machine. Read Operation & Maintenance Manual, Handbook and signs (decals) on machine. Follow warnings and instructions in the manuals when making repairs, adjustments or servicing. Check for correct function after adjustments, repairs or service. Failure to follow instructions can cause injury or death.
W–2003–1289
The following publications provide information on the safe use and maintenance of the loader and attachments:
• The Delivery Report is used to assure that complete instructions have been given to the new owner and that the machine is in safe operating condition.
• The Operation & Maintenance Manual delivered with the loader gives operating information as well as routine maintenance and service procedures. It is a part of the loader and must stay with the machine when it is sold. Replacement Operation & Maintenance Manuals can be ordered from your Bobcat loader dealer.
• The loader has machine signs (decals) which instruct on the safe operation and care. The signs and their locations are shown in the Operation & Maintenance Manual. Replacement signs are available from your Bobcat loader dealer.
• The loader has a plastic Operator’s Handbook fastened to the operator cab. Its brief instructions are convenient to the operator. The handbook is available from your dealer in English edition or French, German, Italian, Dutch & Spanish editions.
• The EMI Safety Manual (available in Spanish) delivered with the loader gives general safety information. • The Service Manual and Parts Manual are available from your dealer for use by mechanics to do shop–type service and repair work.
• The Skid–Steer Loader Operator Training Course is available through your dealer. This course provides information for safe and efficient operation of the Bobcat loader. The course is available in English and Spanish versions.
Warnings on the machine and in the manuals are for your safety. Failure to obey warnings can cause injury or death.
This notice identifies procedures which must be followed to avoid damage to the machine. I–2019–0284
W–2044–1285
Safety Alert Symbol: This Safety Symbol is used for important safety messages. When you see this symbol follow the safety message to avoid personal injury or death.
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953 Bobcat Loader Service Manual
SAFETY INSTRUCTIONS (Cont’d) • Wear tight fitting clothing. Always wear safety glasses when maintaining or servicing loader. Safety glasses, hearing protection or loader special applications kit are required for some work. See your dealer for Melroe Safety equipment.
• Know where fire extinguishers and first aid kits are located and how to use them. • Do not use the Bobcat loader where exhaust, arcs, sparks or hot components can contact flammable material, explosive dust or gases.
• The engine compartment and engine cooling system must be inspected every day and cleaned if necessary to prevent fire hazard and overheating.
• Check all electrical wiring and connections for damage. Keep the battery terminals clean and tight. Repair or replace any damaged part.
• Check fuel and hydraulic tubes, hoses and fittings for damage and leakage. Never use open flame or bare skin to check
for leaks. Tighten or replace any parts that show leakage. Always clean fluid spills. Do not use gasoline or diesel fuel for cleaning parts. Use commercial nonflammable solvents.
• Follow any environmental safety regulations when disposing of used fluids such as engine oil, grease or anti–freeze. • Do not use ether or starting fluids on this engine. It has glow plugs. These starting aids can cause explosion and injure you or bystanders.
• Always clean the loader and disconnect the battery before doing any welding. Cover rubber hoses, battery and all other flammable parts. Keep a fire extinguisher near the loader when welding. Have good ventilation when grinding or welding painted parts. Wear dust mask when grinding painted parts. Toxic dust or gas can be produced.
• Stop the engine and let it cool before adding fuel. No smoking! • Use the procedure in the Operation & Maintenance or Service Manuals for connecting the battery. • Use the procedure in the Operation & Maintenance or Service Manuals for cleaning the spark arrestor muffler. A fire extinguisher is available from your local dealer. The fire extinguisher can be installed in the location shown [A].
A
P–3705
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953 Bobcat Loader Service Manual
SERIAL NUMBER LOCATIONS
A
Always use the serial number of the loader when requesting service information or when ordering parts. Early or later models (identification made by serial number) may use different parts, or it may be necessary to use a different procedure in doing a specific service operation. LOADER SERIAL NUMBER The loader serial number plate is located on the inside of the left upright, above the grill [A]. Explanation of loader Serial Number: XXXX
P–3831
XXXXX Module 2. – Production Sequence (Series)
B
Module 1. – Model/Engine Version The four digit Model/Engine Combination module number identifies the model number and engine combination. This number (in parenthesis beside the model number) is used in the Service Manual to more easily identify the standard, optional and field accessory equipment included or available for each specific model. The five digit Production Sequence Number identifies the order which the loader is produced. ENGINE SERIAL NUMBER
P–3832
The serial number is located above the starter on the engine block [B].
C
DELIVERY REPORT The Delivery Report must be filled out by the dealer and signed by the owner or operator when the Bobcat loader is delivered. An explanation of the form must be given to the owner. Make sure it is filled out completely [C].
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953 Bobcat Loader Service Manual
953 BOBCAT LOADER IDENTIFCATION FRONT LIGHTS OPERATOR SEAT SEAT BAR GRAB HANDLES STEERING LEVERS
SAFETY TREADS
TILT CYLINDERS
BUCKET AUXILIARY HYDRAULIC QUICK COUPLERS STEPS OPERATOR CAB (ROPS & FOPS) LIFT ARM REAR GRILL
+LIFT ARM SUPPORT DEVICE
TAIL LIGHTS
LIFT CYLINDER
REAR LIGHTS
REAR DOOR TIRES*
B–14313 B–14317
* TIRES – Flotation tires (optional) are shown. The Bobcat loader is factory equipped with standard tires. BUCKET – Several different buckets and other attachments are available for the Bobcat loader. ROPS, FOPS – Roll Over Protective Structure, Falling Object Protective Structure, per SAE J1040 and ISO 3471, and Falling Object Protective Structure per SAE J1043 and ISO 3449, Level l. Level ll is available. The Bobcat loader is base–equipped with a standard operator cab as shown. Extra insulated cab is available as an option (Reduced noise level). 953 Bobcat Loader viii Service Manual
OPTIONS AND ACCESSORIES All 953 Bobcat loaders are equipped with the following standard items: Bob–Tach Operator Cab Spark Arrestor Muffler Seat Belt Front Auxiliary Hydraulics Seat Bar Hydraulic Bucket Positioning Bobcat Interlock Control System (BICS™) Parking Brake Gauges/Warning Lights Top & Rear Window Operating Lights Below is a listing of the optional equipment which is available through your Bobcat Loader dealer. Tires 8:00–19.5, 8 PR . . . . . . . . . . . . . . . . . . . . . . . . . . . 14:00–17.5, PR Flotation . . . . . . . . . . . . . . . . . . . 38 x 20 x 16.1, 8 PR . . . . . . . . . . . . . . . . . . . . . . . 9 x 16 Solid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Std. Opt. Opt. Opt.
Operator Cab Suspension Seat . . . . . . . . . . . . . . . . . . . . . . . . . . Horn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Heated Enclosed Cab . . . . . . . . . . . . . . . . . . . . . . Special Applications Kit . . . . . . . . . . . . . . . . . . . . . Cab Enclosure . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fresh Air Heater w/plumbing . . . . . . . . . . . . . . . .
Opt. & FA FA Opt. & FA FA FA FA
Miscellaneous Catalytic Purifier Muffler . . . . . . . . . . . . . . . . . . . . Back–Up Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . Rear Auxiliary Hydraulics . . . . . . . . . . . . . . . . . . . Ether Starting Aid . . . . . . . . . . . . . . . . . . . . . . . . . .
Opt. & FA Opt. & FA Opt. & FA FA
Std. = Standard Equipment Opt. = Factory Installed Option FA = Field Accessory
Specifications subject to change without notice
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953 Bobcat Loader Service Manual
PREVENTIVE MAINTENANCE Page Number
PREVENTIVE MAINTENANCE
AIR CLEANER SERVICE Replacing Filter Element . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–11 ALTERNATOR BELT Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–18 ENGINE COOLING SYSTEM Cleaning the Cooling System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–16 Checking the Coolant Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–16 Removing Coolant From the Cooling System . . . . . . . . . . . . . . . . . . . . . 1–17 ENGINE LUBRICATION SYSTEM Checking Engine Oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–15 Replacing of Oil and Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–15 EXHAUST GAS PURIFIER (Optional) Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–22 Cleaning the Exhuast Gas Purifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–22 FINAL DRIVE TRANSMISSION (CHAINCASE) Checking and Adding Oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–24 FUEL SYSTEM Filling the Fuel Tank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fuel Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fuel Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . In–Line Fuel Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1–13 1–13 1–13 1–14
HYDRAULIC/HYDROSTATIC SYSTEM Checking and Adding Fluid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Hydraulic/Hydrostatic Filter Replacement . . . . . . . . . . . . . . . . . . . . . . . . . Case Drain Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Hydraulic Fluid Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1–20 1–20 1–21 1–21
LIFT ARM SUPPORT DEVICE Disengaging the Lift Arm Support Device . . . . . . . . . . . . . . . . . . . . . . . . . 1–6 Engaging the Lift Arm Support Device . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–6 LIFTING AND BLOCKING THE LOADER Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–4 LUBRICATING THE LOADER Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–25 OPERATOR CAB Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Emergency Exit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Lowering the Operator Cab . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Raising the Operator Cab . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1–7 1–8 1–8 1–7
REAR DOOR Adjusting the Rear Door Latch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–10 Opening the Rear Door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–10 REMOTE START SWITCH Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–27
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953 Bobcat Loader Service Manual
PREVENTIVE MAINTENANCE (Cont’d) Page Number SEAT BAR RESTRAINT SYSTEM Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–9 Seat Bar Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–9 Seat Bar Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–9 SERVICE SCHEDULE Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–3 SPARK ARRESTOR MUFFLER Cleaning Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–22 TIRE MAINTENANCE Tire Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–23 Tire Rotation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–23 Wheel Nuts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–23 TOWING THE LOADER Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–5 TRANSPORTING THE LOADER Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–5 USING A BOOSTER BATTERY (JUMP STARTING) Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–19
–1–2–
953 Bobcat Loader Service Manual
SERVICE SCHEDULE Maintenance work must be done at regular intervals. Failure to do so will result in excessive wear and early failures. The service schedule is a guide for correct maintenance of the Bobcat loader. Instructions are necessary before operating or servicing machine. Read Operation Maintenance Manual, Handbook and signs (decals) on machine. Follow warnings and instructions in the manual when making repairs, adjustments or servicing. Check for correct function after adjustments, repairs or service. Failure to follow instructions can cause injury or death. W–2003–1289
ITEM Engine Oil Air Cleaner Engine Cooling System Lift Arms, Cylinder, Bob– Tach Pivot Pins & Wedges Engine Air System Tires Seat Belt, Seat Bar & Pedal Interlocks Bobcat Interlock Control System (BICS™) Safety Signs & Safety Tread Operator Cab Fuel Filter Hydraulic Fluid, Hoses & Tubelines Final Drive Transmission (Chaincase) Battery Control Pedals & Steering Wheel Nuts Parking Brake Alternator Belt Engine Oil & Filter Spark Arrestor Muffler Engine/Hydro. Drive Belt Fuel Filter Steering Shaft Hyd./Hydro. Filters Hydraulic Reservoir Breather Cap Final Drive Transission Hydraulic Reservoir/ Case Drain Filter Bobcat Interlock Control System (BICS™)
*
SERVICE REQUIRED
8–10
50
100
250 1000
Check the oil level & add oil as needed. Check condition indicator. Service only when required. Clean debris from oil cooler, radiator & grill. Check coolant level cold in recovery tank. Add coolant as needed. Lubricate with multi–purpose lithium based grease (14 places). Check for leaks & damaged components. Check for damaged tires & correct air pressure. Check the condition of seat belt. Check the seat bar & pedal interlocks for correct operation. Clean dirt & debris from moving parts. Check BICS™ functions. Clean dirt, debris or bjects from under or behind seat as required. Check for damaged signs (decals) & safety tread. Replace any signs or safety treads that are damaged or worn. Check the fastening bolts, washers & nuts. Check the condition of cab. Remove debris from the pedal area through the clean–out holes. Remove the trapped water. Check fluid level & add as needed. Check for damage & leaks. Repair & replace as needed. Check oil level. Check battery for damage, hold down, cables, connections & electrolyte level. Add distilled water as needed. Check for correct operation. Repair or adjust as needed. Check for loose wheel nuts & tighten to 320–350 ft.–lbs. (434–475 Nm) torque. Check operations of the parking brake. Check tension & adjust as needed. Replace oil & filter. Use CD or better grade oil and Melroe filter. Clean the spark chamber. * Check gap at rod nuts. Replace filter element & In–Line fuel filter Grease fitting & oil the cross–shaft. Replace the filter elements. Replace the reservoir breather cap. Replace the oil in the chaincase. Replace the fluid. Replace the case drain filter. Check lift arm by–pass control.
Check wheel nut torque every 8 hours for the first 24 hours. Also replace hydraulic/hydrostatic filter element when the transmission warning light comes ON. Or every 12 months. Check every 8 hours for the first 40 hours of operation. First oil and filter change must occur at 50 hours; 100 hours thereafter.
Revised Feb. 97
–1–3–
953 Bobcat Loader Service Manual
PREVENTIVE MAINTENANCE
A
Instructions are necessary before operating or servicing machine. Read Operation & Maintenance Manuals, Handbook and signs (decals) on machine. Follow warnings and instructions in the manuals when making repairs, adjustments or servicing. Check for correct function after adjustments, repairs or service. Failure to follow instructions can cause injury or death.
W–2003–1289
Wear safety glasses to prevent eye injury when any of the following conditions exist:
• • • •
When fluids are under pressure. Flying debris or loose material is present. Engine is running. Tools are being used.
B–7023
W–2019–1285
LIFTING AND BLOCKING THE LOADER Procedure Always park the loader on a level surface.
B Put jackstands under the front axles and rear corners of the frame before running the engine for service. Failure to use jackstands can allow the machine to fall or move and cause injury or death.
W–2017–0286
Lower the lift arms, stop the engine. Put the floor jack under the rear of the loader. Lift the rear of the loader and install jackstands [B].
B–8109
Put the floor jack under the front of the loader. Lift the front of the loader and install jackstands under the axle tubes [C].
C
NOTE: Make sure the jackstands do not touch the tires.
B–8108
Revised June 96
–1–4–
953 Bobcat Loader Service Manual
TRANSPORTING THE LOADER
A
Procedure
Adequately designed ramps of sufficient strength are needed to support the weight of the machine when loading onto a transport vehicle. Wood ramps can break and cause personal injury.
W–2058–0494 B–14315
A loader with an empty bucket or no attachment must be loaded backward onto the transport vehicle [A].
B
Be sure the transport and towing vehicles are of adequate size and capacity.
Use the following procedure to fasten the Bobcat loader to the transport vehicle to prevent the loader from moving during sudden stops or when going up or down slopes [B]. Lower the bucket or attachment to the floor. Stop the engine. Engage the parking brake. Install chains at the front and rear loader tie down positions (Inset) [B]. Fasten each end of the chain to the transport vehicle and tighten the chain with a chain tightener.
B–14318
B–7411
TOWING THE LOADER Procedure To prevent damage to the loaders hydrostatic system, the loader must be towed only a short distance at slow speed. (Example: Moving the loader onto a transport vehicle.) The towing chain (or cable) must be rated at 1–1/2 times the weight of the loader. (See Specification, Page 9–1.) • Turn the key switch to ON and press the Traction Lock Override button. • Tow the Bobcat at 2 MPH (3,2 km/hr.) or less for not more than 25 feet (7,6 meters). If the electrical system is not functioning part of the brake system must be disassembled to move the loader. (See Traction Lock removal and installation procedure, Page 8–1.)
B–14316
–1–5–
953 Bobcat Loader Service Manual
LIFT ARM SUPPORT DEVICE
A
Never work on a machine with the lift arms up unless the lift arms are secured by a lift arm support device. Failure to use an approved lift arm support device can allow the lift arms or attachment to fall and cause injury or death.
1 2
W–2059–0991 P–4550
Engaging the Lift Arm Support Device
B
Maintenance and service work can be done with the lift arms lowered. If the lift arms must be raised for service, use the following procedure: Disconnect the spring (Item 1) [A] from the lift arm support device retaining pin (Item 2) [A] hold onto the support device and remove the retaining pin. Lower the lift arm support device on top of the lift cylinder. Hook the free end of the spring to the lift arm support device so there will be no interference with the support device engagement [B]. With the operator in the seat, seat belt fastened and seat bar lowered, start the engine.
P–4549
C
Raise the lift arms, until the lift arm support device lowers onto the lift cylinder rod [C]. Lower the lift arms slowly until the support device is held between the lift arm and the lift cylinder. Stop the engine. Raise the seat bar and foot controls until both controls lock. Install pin (Item 1) [C] into the rear of the lift arm support device below the cylinder rod.
1
Disengaging the Lift Arm Support Device Remove the pin from the lift arm support device. P–4541
Connect the spring (Item 1) [D] from the lift arm support device to the bracket below the lift arms.
D
With the operator in the seat, seat belt fastened and seat bar lowered, start the engine. Raise the lift arms a small amount and the spring will lift the support device off the lift cylinder rod. Lower the lift arms. Stop the engine.
1
Raise the seat bar and move foot controls until both controls lock. Disconnect the spring from the bracket.Raise the support device into storage position and insert pin through lift arm support device and bracket [A]. Connect spring to pin [A].
P–4547
–1–6–
953 Bobcat Loader Service Manual
OPERATOR CAB
A
Description The Bobcat loader has an operator cab (ROPS and FOPS) as standard equipment to protect the operator from rollover and falling objects. Check with your dealer if the operator cab has been damaged. The seat belt must be worn for roll over protection.
B–7705
ROPS/FOPS – Roll Over Protective Structure per SAE J104 and ISO 3471, and Falling Object Protective Structure per SAE J1043 and ISO 3449, Level l. Level ll is available.
1
Level l – Protection from falling bricks, small concrete blocks and hand tools encountered in operations such as highway maintenance, landscaping, and other construction site services.
P–3847
B
Level ll – Protection from falling trees, rocks; for machines involved in site clearing, overhead demolition or forestry.
Never modify operator cab by welding, grinding, drilling holes or adding attachments unless instructed to do so by Melroe Company. Changes to the cab can cause loss of operator protection from rollover and falling objects, and result in injury or death.
P–3846
W–2069–1285
C
Raising the Operator Cab Stop the loader on a level surface. Lower the lift arms. If the lift arms must be up while raising the operator cab, install the lift arm support device. (See Page 1–6.)
Before the cab or the lift arms are raised for service, jackstands must be put under the rear corners of the frame. Failure to use jackstands may allow the machine to tip backward causing injury or death.
P–4537
W–2014–1285
Loosen the nut (Item 1) [A] (both sides) at the front corner of the operator cab. Remove the nut and plate (both sides) [B]. Lift on the grab handle and bottom of the operator cab slowly until the cab latching mechanism engages and the cab is all the way up [C].
–1–7–
953 Bobcat Loader Service Manual
OPERATOR CAB (Cont’d)
A
Lowering the Operator Cab NOTE: Make sure the seat bar is fully raised or lowered when lowering the cab. Pull down on the bottom of the operator cab until it stops at the latching mechanism. Release the latching mechanism and pull the cab all the way down [A].
P–4538 P–4538
Install the plate and nut (both sides) [B]. Tighten the nuts to 40–50 ft.–lbs. (54–68 Nm) torque.
B
P–3847
Emergency Exit
P–3846
C
The front opening on the operator cab and rear window provide exits. To exit through the rear window, use the following procedure: Pull on the tag on the top of the rear window to remove the rubber cord [C].
P–0660
D
Push the rear window out of the rear of the operator cab. Exit through the rear of the operator cab [D].
P–4546
–1–8–
953 Bobcat Loader Service Manual
OPERATOR CAB (Cont’d)
A
Emergency Exit (Cont’d) NOTE: When an Operator Cab Enclosure Kit (optional) is installed, the window of the front door can be used as an emergency exit. [A] Pull the plastic loop at the top of the window in the front door. Push the window out with your foot.
6707852
SEAT BAR RESTRAINT SYSTEM
B
Description The seat bar restraint system has a pivoting seat bar with arm rests and has spring loaded interlocks for the lift and tilt control pedals. The operator controls the use of the seat bar. The seat bar in the down position helps to keep the operator in the seat. The interlocks require the operator to lower the seat bar in order to operate the foot pedal controls. When the seat bar is up, the lift and tilt pedals are locked when returned to the neutral position. Seat Bar Inspection Sit in the seat and fasten the seat belt. Engage the parking brake. Pull the seat bar all the way down. Start the engine. Operate each foot pedal to check both the lift and tilt functions. Raise the lift arms until the bucket is about 2 feet (600 mm) off the ground.
P–3269
P–3270
C
Raise the seat bar. Try to move each foot pedal. Pedals must be firmly locked in neutral position. There must be no motion of the lift arms or tilt (bucket) when the pedals are pushed.
Clean
Pull the seat bar down, lower the lift arms. Operate the lift pedals. While the lift arms are going up, raise the seat bar and the lift arms should stop. Lower the seat bar, lower the lift arms and place the bucket flat on the ground. Stop the engine. Raise the seat bar and operate the foot pedals to be sure that the pedals are firmly locked in the neutral position. Unbuckle the seat belt.
P–4551
Seat Bar Maintenance See the Service Schedule Page 1–3 and on the loader for correct service interval. Clean any debris or dirt from the moving parts [B] & [C]. Inspect the linkage bolts and nuts for tightness. The correct torque is 25–28 ft.–lbs. (34–38 Nm).
AVOID INJURY OR DEATH The seat bar system must lock the lift and tilt control pedals in neutral when the seat bar is up. Service the system if pedals do not lock correctly.
If the seat bar system does not function correctly, check for free movement of each linkage part. Check for excessive wear. Adjust pedal control linkage. Replace parts that are worn or damaged. Use only genuine Melroe replacement parts.
W–2105–1285
–1–9–
953 Bobcat Loader Service Manual
REAR DOOR
A
Opening the Rear Door
AVOID INJURY OR DEATH Stop, cool and clean engine of flammable material. Never service or adjust loader with engine running unless instructed to do so in manual. W–2061–0887
P–4493
Pull up on the door latch [A] and turn it to open the rear door [B].
B
NOTE: If a rear scarifier attachment is installed, prevent damage to the rear door by making sure the rear door is closed and the latch pin lock is installed before the rear scarifier is raised during loader operation.
Keep the rear door closed when operating the machine. Failure to do so could seriously injure a bystander.
B–4495
W–2020–1285
C
Adjusting the Rear Door Latch Loosen the set screw (Item 1) [C]. Loosen the nut (Item 1) [D]. Turn the bolt (Item 2) [D] in or out until the door contacts both the top and the bottom of the loader frame with the lever in the latched position.
1
NOTE: It takes approximately 50 lbs. (20 kg) of force to push the lever down when the latch is correctly adjusted. With the set screw up, the flanges on the bolt must be to the side so that the set screw aligns with the flat surface of the bolt.
P–4492
D
Tighten the set screw (Item 1) [C].
1
Tighten the nut (Item 1) [D] to 65–70 ft.–lbs. (88–95 Nm) torque.
2 P–4497
–1–10–
953 Bobcat Loader Service Manual
AIR CLEANER SERVICE
A
Replacing Filter Element
2
See the Service Schedule Page 1–3 for the interval to service the air cleaner system. Check the air intake hoses for wear. If the air cleaner is damaged, check all the connections.
1
Replace the large (outer) filter element when the restriction indicator reads more than 22 inch H20 (Item 1) [A]. Replace the inner filter every third time the outer filter is replaced or when the restriction indicator reads 15 inch H20 at full engine RPM after the outer filter has been replaced.
P–4510
B
Use the following procedure to replace the filter element(s): NOTE: Before replacing the filter element, push the button (Item 2) [A] on the restriction indicator and start the engine. Run at full RPM. If readings are less than 22 inch H20 do not replace the filter elements.
1
Stop the engine and open the rear door. Raise the rear grill. Service the air cleaner as follows: Remove the dust cover wing nut (Item 1) [B]. P–4500
Remove the dust cover [B]. Remove the wing nut (Item 1) [C] at the large filter element.
C
1
P–4502
–1–11–
953 Bobcat Loader Service Manual
AIR CLEANER SERVICE (Cont’d)
A
Replacing Filter Element (Cont’d) Remove the large filter element [A]. NOTE: Make sure all sealing surfaces are free of dirt and debris. Install the new filter element and tighten the wing nut. Install the dust cover and tighten the wing nut.
P–4504
Only replace the inner filter elemtent (Item 1) [B] under the following conditions:
B
Replace the inner filter element every thrid time the outer filter is replaced.
1
When the retriction indicator reads 15 inch H20 at full engine RPM, only after the outer filter element has been replaced. Remove the inner filter (Item 1) [B] wing nut. Remove the inner filter. Install a new filter element and tighten the wing nut.
P–4506
–1–12–
953 Bobcat Loader Service Manual
FUEL SYSTEM
A
Fuel Specifications Use only clean, high quality diesel fuel, Grade No. 1 or Grade No. 2 . The following is one suggested blending guideline which should prevent fuel gelling problems: Temp. F° (C°)
No. 2
No.1
+15°(9°) Down to –20° (–29°) Below –20° (29°)
100% 50% 0%
0% 50% 100%
1
P–03845
We recommend an operator contact their fuel supplier for local recommendations.
B
Filling the Fuel Tank
WRONG
Stop and cool the engine before adding fuel. NO SMOKING! Failure to obey warnings can cause an explosion or fire. W–2063–0887
Remove the fuel fill cap (Item 1) [A]. B–13456
Use a clean, approved safety container to add fuel of the correct specifications. Add fuel only in an area that has free movement of air and no open flames or sparks. NO SMOKING! [B].
C
S/N 513111559 & Below S/N 513115072 & Below
Install and tighten the fuel fill cap [A]. Fuel Filter
1 Always clean up spilled fuel or oil. Keep heat, flames, sparks or lighted tobacco away from fuel and oil. Failure to use care around combustibles can cause explosion or fire which can result in injury or death.
P–04499
D
W–2103–1285
S/N 513111560 & Above S/N 513115073 & Above
See the Service Schedule Page 1–3 for the service interval when to remove the water from the fuel filter. Loosen the drain plug (Item 1) [C] or [D] at the bottom of the filter element to drain any water from the filter. Tighten the drain plug.
1 P–09310
Revised Feb. 97
–1–13–
953 Bobcat Loader Service Manual
FUEL SYSTEM (Cont’d)
A
In–Line Fuel Filter
1
See the Service Schedule Page 1–3 for the correct service interval. The In–Line fuel filter (Item 1) [A] is located at the fuel tank. To replace the In–Line fuel filter, raise the operator cab. (See Page 1–7.) Loosen the hose clamps. Remove the in–line fuel filter and replace with a new filter.
Revised June 96
P–04512
–1–14–
953 Bobcat Loader Service Manual
ENGINE LUBRICATION SYSTEM
A
Checking Engine Oil Check the engine oil level every day.
1
Remove the dipstick (Item 1) [A]. Keep the oil level between the marks on the dipstick [B]. Use a good quality motor oil that meets API Service Classification of CD, CE or better. RECOMMENDED SAE VISCOSITY NUMBER (LUBRICATION OILS FOR ENGINE CRANKCASE) C°–34 –29
–23 –18
–13
–7
–1
+4
+10 +15
+21
+27 +32 +38
+43
+49
+54 +60
P–4501
SAE 40 or 20W–50
B
SAE 10W–30
SAE 15W–40
Keep Oil Level Between These Marks
SAE 5W–30
SAE 30W
SAE 20W–20
SAE 10W
⎧°–30 –20
–10
0
+10
+20 +30
+40 +50 +60
+70
+80 +90 +100 +110 +120 +130 +140
TEMPERATURE RANGE ANTICIPATED BEFORE NEXT OIL CHANGE A–1528
Replacing of Oil and Filter See the Service Schedule Page 1–3 for the service interval for replacing the engine oil and filter.
C
Run the engine until it is at operating temperature. Stop the engine. Open the rear door. Remove the drain plug (Item 1) [C]. Drain the oil into a container.
1 P–4507
Remove the oil filter (Item 1) [D].
D
Clean the filter housing surface. Put clean oil on the new oil filter gasket. Install the filter and hand tighten.
2
Install and tighten the drain plug. Remove the filler cap (Item 2) [D] from the oil fill tube. Put 7.0 qts. (6,6 L) of oil in the engine. (See Oil Chart.) Start the engine and let it run for several minutes. Stop the engine.
1
Check for leaks at the oil filter and check the oil level. Add oil as needed if it is not at the top mark on the dipstick. P–4509
–1–15–
953 Bobcat Loader Service Manual
ENGINE COOLING SYSTEM
A
Checking the Coolant Level Check the cooling system every day to prevent over–heating, loss of performance or engine damage.
1
Wear safety glasses to prevent eye injury when any of the following conditions exist:
• • • •
P–4515
When fluids are under pressure. Flying debris or loose material is present. Engine is running. Tools are being used.
B
W–2019–1285
Open the rear door. Raise the rear grill. Check the coolant level in the coolant recovery tank (Item 1) [A]. The coolant recovery tank must be 1/3 full. Propylene Glycol Add premixed coolant; 47% water and 53% propylene glycol to the recovery tank if the coolant level is low. P–4517
One gallon and one pint of propylene glycol mixed with one gallon of water is the correct mixture of coolant to provide a –34°F (–37°C) freeze protection. Use a refractometeror coolant test strips (P/N 6724274) to check the condition of propylene glycol in your cooling system. Never mix propylene glycol with ethylene glycol. Cleaning the Cooling System Raise the rear grill [A]. Use air pressure or water pressure to clean the top of the oil cooler [A]. Raise the oil cooler and clean the top of the radiator [B]. Check cooling system for leaks.
–1–16–
953 Bobcat Loader Service Manual
ENGINE COOLING SYSTEM (Cont’d)
A
Removing Coolant From the Cooling System
1
Do not remove radiator cap when the engine is hot. You can be seriously burned. W–2070–1285
Open the rear door. Open the rear grill.
P–4517
Remove the radiator cap (Item 1) [A].
B
Connect a hose to the engine block drain valve (Item 1) [B]. Open the drain valve and drain the coolant into a container. After all the coolant is removed, close the drain valve. NOTE: Protect the cooling system by adding premixed coolant to the system. (See Page 1–16.) This mixture will protect the cooling system to –34oF. (–36oC.)
1
Mix the coolant in a separate container. (See Specifications for correct capacity, Page 9–1.) Fill the radiator with the premixed coolant. Install the radiator cap.
P–4516
Fill the coolant recovery tank 1/3 full. Run the engine until it is at operating temperature. Stop the engine. Check the coolant level in the recovery tank when cool. Add coolant to the recovery tank as needed.
–1–17–
953 Bobcat Loader Service Manual
ALTERNATOR BELT
A
Adjusting the Alternator Belt
1
Stop the engine. Open the rear door. Loosen the alternator mounting bolt (Item 1) [A]. Loosen the adjustment bolt (Item 2) [A].
2 P–4534
Move the alternator until the belt has 5/16 inch (8,0 mm) movement at the middle of the belt span with 15 lbs. (66 N) of force [B].
B
Tighten the adjustment bolt and mounting bolt. Close the rear door.
P–4514
–1–18–
953 Bobcat Loader Service Manual
USING A BOOSTER BATTERY (JUMP STARTING)
A
Procedure If it is necessary to use a booster battery to start the engine, BE CAREFUL! There must be one person in the operator’s seat and one person to connect and disconnect the battery cables.
2 4
The ignition must be in the OFF position. The booster battery to be used must be 12 volt.
P–4526
Keep arcs, sparks, flames and lighted tobacco away from batteries. When ”jumping” from booster battery make final connection (negative) at engine frame. Do not jump start or charge a frozen battery. Warm battery to 60oF. (16oC.) before connecting to a charger. Unplug charger before connecting or disconnecting cables to battery. Battery gas can explode and cause serious injury. W–2066–0490
1
Connect the end of the first cable (Item 1) [A] to the positive (+) terminal of the booster battery. Connect the other end of the same cable (Item 2) [A] to the positive terminal on the starter.
3
P–4522
Connect the end of the second cable (Item 3) [A] to the negative (–) terminal of the booster battery. Connect the other end of the same cable (Item 4) [A] to the engine. Keep cables away from moving parts. Start the engine. See Operation & Maintenance Manual for Cold Temperature Starting Condition. After the engine has started, remove the ground (–) cable (Item 4) [A] first. Remove the cable from the positive terminal on the starter.
Damage to the alternator can occur if:
* Engine is operated with battery cables disconnected.
* Battery cables are connected when using
*
a fast charger or when welding on the loader (Remove both cables from the battery). Extra battery cables (booster cables) are connected wrong. I–2023–1285
–1–19–
953 Bobcat Loader Service Manual
HYDRAULIC/HYDROSTATIC SYSTEM
A
Checking and Adding Fluid Use only recommended fluid in the hydraulic system. (See Specifications Section for the correct fluid Page 9–1.)
1
2
To check the reservoir, use the following procedure: Put the Bobcat loader on a level surface. Lower the lift arms and tilt the Bob–Tach fully back. Stop the engine. Remove the dipstick (Item 1) [A].
P–3850
B
The fluid level must be between the marks on the dipstick [B]. If fluid is needed, remove the fill cap (Item 2) [A]. Add the fluid as needed to bring the level to the top mark on the dipstick [B]
P–3851
C
Hydraulic/Hydrostatic Filter Replacement See the Service Schedule Page 1–3 for the correct service interval. NOTE: Drive belt shield was removed for clarity. Open the rear door. Use a filter wrench. Remove the filter elements (Items 1 & 2) [C]. Clean the surface of the filter housing where the element seal contacts the housing. Put clean oil on the rubber seal of the filter element.
2
1
Install and hand tighten the filter elements
P–4533
–1–20–
953 Bobcat Loader Service Manual
HYDRAULIC/HYDROSTATIC SYSTEM (Cont’d)
A
Case Drain Filter See the Service Schedule Page 1–3 for the correct service interval. Raise the operator cab. (See Page 1–7.) Use a filter wrench. Remove the filter element (Item 1) [A].
1
Clean the surface of the filter housing where the element seal contacts the housing. Put clean oil on the rubber seal of the filter element.
P–4529
Install and hand tighten the filter element. Hydraulic Fluid Replacement
B
See the Service Schedule Page 1–3 for the service interval. The fluid must also be replaced if it becomes contaminated or after major repairs.
1
Remove the reservoir fill cap (Item 1) [B].
Raise the operator cab. Connect a 5/8 inch ID hose to the drain valve. Open the drain at the bottom of the reservoir (Item 1) [C]. Let the fluid flow into a container.
P–3850
C
Close the drain when the reservoir is empty. Remove the screen (Item 1) [D]. Wash the screen in clean solvent and install it in the fill pipe.
1
Remove the hydraulic/hydrostatic filter elements. (See Page 1–20.) Install new filter elements. Add fluid to the reservoir until the fluid is at the top mark on the dipstick. (See the Specifications Section for type of fluid and capacity.) DO NOT fill above the top mark on the dipstick. Lower the operator cab. Start the engine and operate the loader through the hydraulic and hydrostatic functions.
P–4513
Stop the engine. Check the fluid level again and add as needed.
D
1
Always clean up spilled fuel or oil. Keep heat, flames, sparks or lighted tobacco away from fuel and oil. Failure to use care around combustibles can cause explosion or fire which can result in injury or death. W–2103–1285 P–3843
–1–21–
953 Bobcat Loader Service Manual
SPARK ARRESTOR MUFFLER
A
Cleaning Procedure See the Service Schedule Page 1–3 for service interval for cleaning the spark arrestor muffler. Do not operate the loader with a defective exhaust system.
1
Stop the engine. Open the rear door and rear grill. Remove the plug (Item 1) [A] from the bottom of the muffler . Start the engine and run for about 10 seconds while a second person, wearing safety glasses, holds a piece of wood over the outlet of the muffler.
P–4525
Stop the engine. Install and tighten the plug. Lower the rear grill and close the rear door. EXHAUST GAS PURIFIER (Optional) Function
When an engine is running in an enclosed area, fresh air must be added to avoid concentration of exhaust fumes. If the engine is stationary, vent the exhaust outside. Exhaust fumes contain odorless, invisible gases which can kill without warning.
The Exhaust Gas Purifier, when installed on the 953 loader, provides a cleaner exhaust by burning excess carbon particles and gases emitted by the engine. When the purifier is installed on a new loader, the purifier must be cleaned every 6 to 8 months.
W–2050–1285
Stop engine and allow the muffler to cool before cleaning the spark chamber. Wear safety glasses or goggles. Failure to obey can cause serious injury.
Cleaning the Exhaust Gas Purifier Remove the purifier from the engine on the loader.
W–2011–1285
Use air pressure to force any loose particles or debris from the purifier.
Never use machine in atmosphere with explosive dust or gases or where exhaust can contact flammable material. Failure to obey warnings can cause injury or death.
If soft carbon deposits are present, a pressure washer can be used to wash any remaining carbon deposits from the purifier.
W–2068–1285
NOTE: Do not place the nozzle of the air or pressure washer inside the purifier. Maximum pressure of 50 PSI (345 kPa) is allowed for the cleaning procedure. Dry the purifier thoroughly with air. This loader is factory equipped with a U.S.D.A. Forestry Service approved spark arrestor muffler. It is necessary to do maintenance on this spark arrestor muffler to keep it in working condition. The spark arrestor muffler must be serviced by dumping the spark chamber every 100 hours of operation. If this machine is operated on flammable forest, brush or grass covered land, it must be equipped with a spark arrestor attached to the exhaust system and maintained in working order. Failure to do so will be in violation of California State Law, Section 4442 PRC. Make reference to local laws and regulations for spark arrestor requirements. I–2022–1285
–1–22–
953 Bobcat Loader Service Manual
TIRE MAINTENANCE
A
Wheel Nuts See the Service Schedule Page 1–3 for the service interval to check the wheel nuts. The correct torque is 105–115 ft.–lbs. (142–156 Nm) torque [A]. Tire Rotation Check the tires regularly for wear, damage and pressure. (See Specifications, Page 9–1 for the correct tire pressure.) Rear tires usually wear faster than front tires. To keep tire wear even, move the front tires to the rear and rear tires to the front [B].
P–4540
B
It is important to keep the same size tires on each side of the loader. If different sizes are used, each tire will be turning at a different rate and cause excessive wear. The tread bars of all the tires must face the same direction. Recommended tire pressure must be maintained to avoid excessive tire wear and loss of stability and handling capability. Check for the correct pressure before operating the loader. Tire Mounting Tires are to be repaired only by an authorized person using the proper procedures and safety equipment. Tires and rims must always be checked for correct size before mounting. Check rim and tire bead for damage.
B–9976
The rim flange must be cleaned and free of rust. The tire bead and rim flange must be lubricated with a rubber lubricant before mounting the tire, avoid excessive pressure which can rupture the tire and cause serious injury or death. During inflation of the tire, check the tire pressure frequently to avoid over inflation.
Do not inflate tires above specified pressure. Failure to use correct tire mounting procedure can cause an explosion which can result in injury or death. W–2078–1285
Inflate tires to the MAXIMUM pressure shown on the sidewall of the tire. DO NOT mix brands of tires used on the same loader. I–2057–0794
–1–23–
953 Bobcat Loader Service Manual
FINAL DRIVE TRANSMISSION (CHAINCASE)
A
Checking and Adding Oil The chaincase contains the final drive sprockets and chains and uses the same type of oil as the Hydraulic/Hydrostatic System. (See Specifications Section, Page 9–1.)
1
To check the chaincase oil level, use the following procedure: Drive the loader on a level surface. Stop the engine. Remove the plug (Item 1) [A] from the front of the chaincase housing If oil can be reached with the tip of the your finger through the hole the oil level is correct.
P–4537
If the level is low, add oil through the check plug hole until the oil flows from the hole. Install and tighten the plug.
–1–24–
953 Bobcat Loader Service Manual
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